Tumblr added two-factor authentication method for its users. This will help in keeping hackers away. In this new system, users will need their mobile phone while accessing their account. When a user needs to sign in, Tumblr will send a code to his/her mobile phone to verify the identity of the account owner.The user will have to put this code in the space provided on the log-in page. To be able to use this new feature,the user will have to enable this his/her account settings.By implementing this security system, Tumblr in now in-line with other services like Gmail, Dropbox, Facebook, Twitter, etc..